APA (7th ed.) Citation

De Bono, E. (1991). Conflicts: A better way to resolve them. Penguin Books.

Chicago Style (17th ed.) Citation

De Bono, Edward. Conflicts: A Better Way to Resolve Them. Harmondsworth: Penguin Books, 1991.

MLA (8th ed.) Citation

De Bono, Edward. Conflicts: A Better Way to Resolve Them. Penguin Books, 1991.